Last night I happened upon a video on youtube of a JSU-152 being started up after being stored in field for many years. The video is not with English, so I could not tell what was being said.
But the big thing I did notice was how the tracks would really show a lot of sag while idling. When the beast started to move you could see sag either at the front while reversing or at the rear when moving forward. The title was in Slavic ,or Polish or Russian, I don't know, but they loaded it on a trailer and unloaded it later.
That they were able to get it started and moving that quickly was pretty impressive as far as getting something like that moving again. Pretty neat.
What I was watching at the time were videos on Construction Equipment, and that one popped up in the list for viewing on the side.